a garbage是可数的，garbages是garbage的名词复数，garbage是可数名词。但当作垃圾，废话时，是不可数的。
garbage：
n.(生活)垃圾;废物;垃圾场;垃圾箱;垃圾桶;废话;无聊的东西；
复数： garbages
Though he was often mistaken for a garbage can.
尽管他总被误认为是垃圾桶。
The pause time is the amount of time that a garbage collection cycle took to complete.
暂停时间是垃圾收集周期完成所需的时间。
He pushed me into a garbage can in front of everyone.
他当着大家的面把我推到垃圾桶里。
You can't line a garbage pail with a television set.
你无法用电视机来垫衬垃圾桶。
Jeez, what garbage!
天哪，这是什么破烂儿！
A pile of garbage choked the pipe.
一大坨垃圾堵塞了管道。
Tom went to dump the garbage.
汤姆去倒垃圾。
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